Portola WWTP
Portola, CA · Plumas County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.5 MGD
- NPDES permit
- CA0077844
- Effective
- Permit expires
- May 2029
- Population served
- 1,890
- CWNS 2022
Portola WWTP is a publicly owned wastewater treatment works in Portola, Plumas County, California, serving about 1,890 residents. Treatment on site includes aerated lagoons, uncovered lagoons. It discharges under NPDES permit CA0077844 (effective), which expires in May 2029, with 677 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 677
- Effluent violations
- 21
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Portola WWTP.
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Nearby wastewater treatment plants in California
Portola · 1 mi away
—
Quincy · 25 mi away
—
Susanville · 43 mi away
1.02 MGD
Nevada City · 44 mi away
0.0063 MGD
Nevada City · 47 mi away
0.38 MGD
Chester · 52 mi away
—
Penn Valley · 55 mi away
0.35 MGD
Smartsville · 60 mi away
0.01 MGD
Portola WWTP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated June 18, 2026.